Sheet metal multiple gas burner



Feb. 13, 1951 J. w. MILLER SHEET METAL MULTIPLE GAS BURNER 2Sheets-Sheet 1 Filed Sept. 21, 1948 A TTdi/VE Y5 Feb. 13, 1951 J. w.MILLER 2,541,710

SHEET METAL MULTIPLE GAS BURNER Filed Sept. 21, 1948 2 SheetsSheet 2 INV EN TOR.

c/a/m W. MU/er ATTQRNEYJ UNITED STATES PATENT OFFICE SHEET METALMULTIPLE GAS BURNER John W. Miller, Lansing, Mich., assignor to MotorWheel Corporation, Lansing, Mich., a corporation of Michigan ApplicationSeptember 21, 1948, Serial No. 50,261

8 Claims.

This invention relates to a gas burner and more particularly to a gasburner made from one or more strips of sheet metal.

It is old in the art to fabricate a gas burner of parallel transverselyextendingflutes Ill. Each flute I is in the form of a semi-cylinder sothat when sections 1 and 8 are juxtaposed in complementary relation theflutes cooperate to form gas from two strips of steel which are stampedor outlet ports H. Fluted edges 9 of sections 1 rolled to shape to formcomplementary right and and 8 contact as at i2 between the flutes andleft hand members which are positioned one are preferably spot Weldedtogether at these conupon the other and then welded together alongtacting portions 52. Sections 1 and 8 can be a portion of theirperiphery and provided with joined together in any suitable manner butprefa line of ports along one of the edges. When this erably are weldedtogether along their lower edge type of burner is made in the form of arelaportions 13 and the outer end portion is. tively long thin unit andthe gas is supplied Each jet tube 2, 3 and 4 is of the Bunsen typethrough a jet tube at one end of the unit, a seriand provided with aplurality of air inlets l5 ous problem arises in respect to uniformlydisin the body of the jet tube. Burner body 1 is tributing the gas toall of the burner ports. One provided with two air inlets it for each ofthe of the defects of this type of burner has been that jet tubesadjacent the outlet ends l'i. the gas will not be uniformly distributedto all Each burner section I and 8 is provided with of the portsthroughout the length of the burner, three longitudinally extendingparallel corrugawhich has caused some of the ports to burn with tions orflutes l8, l9 and 25 which, when sections a higher flame than others, 7and 8 are secured together in juxtaposed com- This inventioncontemplates a gas burner made plementary relation, provide sockets intowhich of strip metal in a relatively long narrow unit the jet tubes 2, 3and 6 respectively are received in which the combustible gas (such as,natural in tight fitting relation. Preferably there should gas 1025 B.t. u., city gas 550 B. t. u.) will be be one corrugation for each jettube. Accordinguniformly supplied to the burner ports through- 1y,since, by way of illustration, I have .shown out the length of theburner, my burner with three jet tubes (2, 3, 4), the

It is also an object of the invention to produce burner body will beprovided with three corrua gas burner of strip metal which is of simplegations (l8, i9, 28). Corrugation #8 will exstructure, easy tofabricate, long-lived, and eftend about one-third of the length of theburner ficient in operation. 30 body, corrugation l9 about two-thirds ofthe Fig. 1 is a side elevation of my burner. length of the burner body,and corrugation 20 Fig. 2 is a top view of my burner. will extendsubstantially throughout the length Figs. 3, 4, 5 and 6 are sectionsalong the lines of the burner body, Burner sections 1 and 8 fit 33,44,55and 6-6 of Fig.1. tightly together along the troughs 2| between Fig. 7is an enlarged horizontal sectional view corrugations I 8 and i9 andalso along troughs through the top jet tube of the burner shown in 22between adjoining corrugations l9 and 20. Fig, 1 Since the burnersections come tightly together Fig. 8 is a fragmentary side elevation ofa along troughs 2| and 22, it is not necessary to modified form ofburner, and Weld these corrugations together but they can be Fig. 9 is afragmentary top view of the same. welded along elongated contacts 2| and22 if de- Fig. 10 is a section taken along the line Ill-i0 sired. ofFigs. 8 and 9. Top corrugations [8 form top channel 23 Referring moreparticularly to the drawings, through which a mixture of combustible gasand my burner comprises a burner body, generally air is fed from jettube 2 to substantially onedesignated l, to which a combustible gas issupthird of ports H. Corrugations l9 form chanplied through a pluralityof jet tubes which, by nel 25 through which a mixture of combustible Wayof illustration, are exemplified by jet tubes gas and air is fedprimarily from jet tube 3 to 2, 3 and 4, which are positioned one abovethe the middle one-third portion of ports ll and corother and arethreaded into a gas manifold 5 to rugations 20 form a. lower channel 25through which a combustible gas under pressure is supwhich'a mixture ofcombustible gas and air from plied through a pipe line 6 controlled bya, conjet tube 4 is fed to the outer or right hand subventional gasvalve (not shown). stantially one-third of ports I i. Channels 23 Theburner body is made from two strips of and 24, of course, communicate atthe end of metal 1 and 8 which are formed complementary troughs 2! as at26 and channels 24 and 25 right and left handed. Members I and 8 arecommunicate at the ends of troughs 22 as at 21. placed together to forma body. Burner sections ,Thus, abutting trough portions 2| and 22 can Iand 8 are preferably formed by stamping but also be considered asbafiles extending from the conceivably can be made as rolled sections.jet tube end of the burner approximately one- Each section 1 and 8 hasits upper longituthird and two-thirds respectively of the length dinaledge portion 9 provided with a plurality of burner body I. Thus, theeffect of corrugations l8, l9 and 20 is to distribute and direct thecombustible gas-air mixture from jet tubes 2, 3 and -.4 through theburner body I so that the gaseous mixture is uniformly distributed toall of the ports ll. With my arrangement of feeding channels I haveobtained a burner in which the gaseous mixture is uniformly distributedto ports H and the flames over ports II will be of uniform height duringthe operation of the burner.

The form of burner shown in Figs. 8, 9 and is identical with theprincipal ,form of burner shown in Figs. 1 to '7 except that ports IIare divided by a thin strip of ,metal 30 running'lengthwise of theburner body, Strip 30 can be conveniently retained in place by spotwelding the same at a plurality of points to trough portions l2 of thefluted edges of sections 1 and 8.

During operation of this modified form of burner ribbon 30 tends tolower the temperature of the burner at ports H.

Burner body I is preferably made from two strips of stainless steel.

The burner shown in Figs. 1 through '7, as an exemplification of myburner, has ports H the size of a #29 drill and ports II are spaced fourper inch. The length of the burner body I is approximately 22 inches,the overall height in the area of section 4-4, 2 inches, and thethickness -7 of an inch. From the above dimensions it is evident whythis burner has been characterized as a strip burner and why it has beendefined as a long thin unit.

Gas is used herein generically to cover both combustible .gas and air ormixtures thereof.

I claim:

1. A gas burner comprising a hollow body formed of sheet metal the sidewalls of which are secured along one longitudinal edge, a row ofsubstantially parallel flutes formed in the other longitudinal edge ofeach side wall of said burner, said flutes extending substantiallyperpendicular to the longitudinalaxis of said burner, the flutes in eachedge being juxtaposed'in aligned relation with the flutes in the otheredge and with the concave faces of the flutes opposed whereby the flutesform a row-of ports in the one longitudinal edge of saidburner, aplurality of lengthwise corrugations of different lengths in the sidewalls of said burner extending from one end of said body to said row ofports, each of said lengthwise corrugations in one side wall beingjuxtaposed-to a corresponding lengthwise corrugation in the other sidewall and with their concave faces opposed and with their trough portionsin contact substantially throughout their lengths, the-shortercorrugation being positioned between the said row of ports andthe nextlonger corrugation, said corrugations having their concave facespositioned inwardly of the burner body whereby the corrugationscooperate to form enclosed channels of different lengthsin the burnerbody and extending-from one end thereof .to saidrow of ports, and means'at said end of the burner body for supplying gas underpressure into:said channels whereby the gas is distributed'by said channels todifferent portions of said row ofports, the shorter channel distributinggas to a portion of said row of ports closer to the jet tube end of saidburner than the portion of said row of ports supplied by said longerchannel.

2. The gas burner claimed in claim 1 wherein :said means comprises .ajet-tube for each of :said

4 channels and the jet tubes extend into the outer ends of saidchannels.

3. The gas burner claimed in claim 2 wherein said flutes andcorrugations are stamped in said sheet metal burner body.

4. The gas burner claimed in claim 3 wherein :the number of lengthwisecorrugations correspond to the number of jet tubes and the length -ofeach corrugation is substantially a multiple of the shorter corrugationwhereby each of said v channels supplies substantially a correspondingnumber of ports with gas.

5. The gas burner claimed in claim 4 including a manifold communicatingwith said jet tubes for supplying gas thereto.

. 6. The gas burner claimed in claim 5 wherein each jet tube is providedwith at least one port for supplying air to the combustible gas flowingthrough said jet tube and wherein the side wall of the burner isprovided with an air inlet port adjacent the outlet end of said jettube.

7. A gas burner comprisin a hollow body formed of sheet metal, the sideWalls of which are secured along one longitudinal edge, a 'row ofsubstantially parallel flutes formed in the other longitudinal edge ofeach side wall of said burner, said flutes extending substantiallyperpendicular to the longitudinal axis of the burner, the flutes'in eachedge being juxtaposed in aligned relation with the flutes in the otheredge and with the concave faces of the flutes opposed, whereby theflutes form a row of ports in one longitudinal edge of said burner, aplurality of lengthwise corrugations of different lengths in the sidewalls of said burner, said corrugations extending generallylongitudinally of said body from one end thereof and being verticallyspaced and inclined toward said-row of ports, each of said lengthwisecorrugations in one side wall being juxtaposed to a correspondingcorrugation in the other side wall and with their concave faces opposedand with their trough portions in contact substantially throughout theirlengths, the shorter corrugation being positioned between-said row ofports and the next longer corrugation, said corrugations having theirconcave "faces positioned inwardly of the burner body whereby thecorrugations cooperate to form enclosed channels of different lengths inthe burner body extending from one end of said body to said row ofports,.-and means at saidend of said burner body for supplying gas underpressure into said channels whereby the gas is distributed by saidchannels to different portions of said row of ports, the shorter channeldistributing gas to a portion of 'saidrow of ports closer to the jettube end of said burner than the portion of said row of ports suppliedby said longer channel.

8. The gas burneras claimed in claim? wherein the cross sections of theinclined portions of at least the longer corrugationsprogressivelyincrease in size toward said row of ports.

JOHN W. MILLER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS 'Zimbelman et a1. "May 24, 19,49

